<template>  
    <div class="goods">
      <div class="wrap">
        <Crumb> </Crumb>
        <img src="../assets/img/banner.4c6b6225.png" width="100%" alt="" />
        <ul class="options">
          <li>
            <strong>排序：</strong>
            <span v-for="item,index in options1" :key="index" :class="{active:options1curr == index}" @click="options1Fn(index,item.min,item.max)">{{ item.txt }}</span>
          </li>
          <li>
            <strong>分类：</strong>
            <span v-for="item,index in options2" :key="index" :class="{active:options2curr == index}"  @click="options2Fn(index,item.type)">{{ item.txt }}</span>
          </li>
        </ul>
        <List :arr="goodsListShow" />
        <div>{{isReachBottom ? '加载完毕!' : '加载中....'}}</div>
      </div>
    </div>
  </template>                            
  <script>
  
  import Crumb from "../components/Crumb.vue";
  import List from "../components/home/List.vue";
  import { GoodsSearchAPI } from "@/request/api";
  import { getScrollTop,getClientHeight,getScrollHeight } from "@/utils/index"
  export default {
    data() {
      return {
        //  产品列表
        goodsList:[],
        goodsListShow:[],
        page:1,
        size:8,
        isLoading:false,
        isReachBottom : false,
        did:0,
        type:0,
        min:0,
        max:0,
        keyword:"",
        options1:[
          { min: 0, max: 0, txt: "全部" },
          { min: 0, max: 0, txt: "我还可以兑换" },
          { min: 0, max: 500, txt: "0-500分" },
          { min: 500, max: 1000, txt: "500-1000分" },
          { min: 1000, max: 1500, txt: "1000-1500分" },
          { min: 1500, max: 2500, txt: "1500-2500分" },
          { min: 2500, max: 6500, txt: "2500-6500分" },
          { min: 6500, max: 10000, txt: "6500-10000分" },
        ],
        options2: [
          { type: 0, txt: "全部" },
          { type: 1, txt: "实体商品" },
          { type: 2, txt: "虚拟商品" },
        ],
        options1curr:0,
        options2curr:0,
      };
    },
    components: {
      Crumb,
      List,
    },
    created() {
      
      let keyword = this.$route.query.keyword;
      let did = +[this.$route.query.did ? this.$route.query.did : 0]
      // console.log(keyword);
      // console.log(did);
      this.keyword = keyword
      this.did = did
      this.getGoods()
    },
    mounted(){
      window.addEventListener("scroll",this.scrollFn); 
    },
    beforeDestroy() {
      window.removeEventListener("scroll",this.scrollFn);
    },
    watch: {
      "$route.query.keyword":{
        handler(newVal,oldVal) {
          // console.log(newVal,oldVal);
          this.keyword = newVal;
          this.getGoods();
        }
      }
    },
    methods:{
      async getGoods(){
        let res = await GoodsSearchAPI({
        did:this.did,
        type:this.type,
        min:this.min,
        max:this.max,
        keyword:this.keyword
      });
      // console.log(res.data);
      this.goodsList = res.data;
      this.goodsListShow = this.goodsList.filter((item, index) => index < 8);
      
      this.page=1;
      console.log(this.page);
      this.isReachBottom = false;
      if(this.goodsListShow.length == this.goodsList.length){
            this.isReachBottom = true;
          }
      },
      options1Fn(idx,min,max){
        this.options1curr = idx;
        this.min = min;
        this.max = max;
        // 重新请求数据
        this.getGoods();
      },
      options2Fn(idx,type){
        this.options2curr = idx;
        this.type = type;
        // 重新请求数据
        this.getGoods();
      },
      scrollFn() {
        console.log("滚动了>>>>",getScrollTop(),getClientHeight(),getScrollHeight());
        if(getScrollTop()+getClientHeight() >= getScrollHeight() - 240){
          if(this.goodsListShow.length == this.goodsList.length){
            this.isReachBottom = true;
            return;
          }
          console.log("准备加载下一页");
          if(this.isLoading == false) {
            this.isLoading = true;
            this.page++;
            setTimeout(()=>{
              for(let i=this.size*(this.page - 1);i<this.size*this.page;i++){
              if(i>this.goodsList.length-1){
                return;
              }
              console.log("准备开始push数据",this.page,i);
              this.goodsList[i] &&this.goodsListShow.push(this.goodsList[i]);
            }
            this.isLoading = false;
            },1000);
          }
          
          
        }
      }
    }
  };
  </script>
   
  <style lang = "less" scoped>
  @import "../assets/css/public.less";
  
  .goods {
    padding-bottom: 50px;
    background: #efefef;
    padding-top: 20px;
    .options {
      padding-top: 20px;
      padding-bottom: 40px;
      li {
        margin-top: 20px;
        strong {
          color: #000;
          font-weight: bold;
        }
        span {
          margin-right:20px;
          margin-left: 10px;
          cursor: pointer;
          color: #999;
          &.active {
            color: @base-color;
            font-weight: bold;
          }
        }
      }
    }
  }
  </style>